Rock-drill.



PATENTED JUNE 12, 1906.

E. LBIGHTBR.

- ROCK DRILL.

APPLIGATION FILED muza mos.

a r- NN a me:

Inventor Attorney Witnesses 8W Rb M. S. B,

ll llll lll l i lljliil l lfl llfATlYlilNT QFFICE.

siimliv i iz u ELL- My; 519, 19 35 Be it lmowu that l flown-111i lii iionriui, a citizen of the l nitml Hiatus, li'zlll all) No veil City NM if? i 5 oliiw iidili'ese l\' invented em in ,m-u. i monks in Iliorlolfhills o? wool: lle {allowing i3 o :sperllivuliun.

This invention @6 24.

sure, will be readily m'u'lersiooil il' n] 'Zilie mi lowing ilosvriptiiin, lsiluro the e.i*(:ooipa.n ing ilituvii'ige in Wllli'l! Figure l is i longitudinal seolion oi 1n the ire-wings, 1 2m.

notes a ylimlricul 2o shell. having :1 eylimli'ieel more; 2, a, Llireer upon the exterior of the shell; .J, the rear heed for llif: shell this head forming also a. rear Uylimler-heml for the i'nocliine; -1 :1. cap sorewed upon the rear end of the shell by means of an iliteriorly ecrew-threaded ring 4 end securing i/llQ rear liead in niece, this oxtem log cylinllie cap hoping: a rearwez'dly ducal shank; 5, a T-pieoe swiveled upon shank of Lhe are vimrl wlmalm mated with it film inlelvllilw 511g fluid 6, the pportlug-damp for tv ie we chine, the some being internally threaded to engage the threads of the shell, e0 aim by turning the shell the general device may be advanced with reference to the clamp; 7, o erank secured upon the reel and of. the shank of the shellmep, wlmre ay the thr aded Sllel'l may be turned in the. "Gill? lxmned by Lin: clamp; 8, a i'llfil-lllrlllllllg flllfllfllfifil' Wlllilll the shelLheail 3 3 3, am axle; passage in ilk: shank of die shell-on 3 mpg; will; {mm the dastributmgmiiamher 8 2: 1 t-ximiog 11L rig-lib in (1.)fll1lillllili Willi Spovilioajon oi Letters Patent,

3 l l i Pa'cented June 12, 1906.

nick 251,294.

pro ionliing outwardly beyond the front end of t w shell; 13, a bushing screwed-solidly into tho lront end of the shell and forming a lie-wing (or the chuck-body at the forward of ilm shell; 14, keys carried by the a l-Z lwily where it fits within the bushing 11%, llieeo keys eiigogizw keyw'a'ys in film bush- 1 35, H1; ilmt the GllllilI-Dfld) me Y reoiprocate tum relative to the asking and nil-lei? 15,;fomi imi-riiig--say of rubberdisun-Kl moimd lhe clumk-lmcly and engaging ll W991i iii-e not 111.00 of the bushing and a *proewnling shoulder upon the y; 16, die shank of the drill sepagaging a bore in the nose of'the :mly; 17, the piston arranged for oation in the cylinder; 18 the stnikindg 1 ii of the pietom'beiog its lei-ward en silo atm'l to sLrilce upon the rem end of'the irill slmnk; 19, an annular rib Within the eyliziiler fitting upon the body of the iston, Ll ill! being termed the exhaust-Ii 20, an enlarged cylindrical head upon the rear nd of the piston; 21 an annular rib upon the interior of the cylinder en a ing the enlarged head of the piston, this Tl fieing termed the beolecuehion rib; 22, an annular rib upon the interior of the cylinder between tho ribs 19 21 and fitting tlie enlerge head ofthe piston, this rib lining termed the fiont-cushion rib; 23, an annular rib non the interior of film oylimler at its forwai-(Fund ada ted to ill; be maifi oylimlnoal portion of l; e pistol this I'll) ooin longitudinally grooved, so that when the lm y of the piston is disposed within the rib the grooves will furnish passages for the fluid, this rib being termed the Vllym'izi u-yilzf" 24, portS at the front end of posse loading from the rlist'rilmting-elmmbet 8 and ezlmilting the supply fluid a all l-in'ms to tho cylinder at, a point between ribs and i9 25, e3 lnmst-porblvmling from the inlerim of the cylinder uiiliwm'illy tlil'ou l1 ilac: vlzzurlobotly; Ell, ports in the main bOf i -wimtmi in about the middle of its length lin from (,liv. rein end of the cylinder a 2' pnssugo'ur cavity formoil 111 the 4 ion; 2?, i-all'lllli-il' ports in llie onlairgml real need of llie piston; 28, flattened sides of the alfflll'fllflllllk where the shank engages within the bore of the chuck-body; 29, (ilmok-ows sliding; radially in mortises in the nose ol the 4c: gree in a forward direction.

so piston museu ports to KO clear the eylintlrieul portion of the clrillshank; 21ml 32, u spring pin radially disposed in the chuck-ring, its point engngin" i1. sew mental roove in the nose of the ehutilr-borly, ouch on of this groove being deepened to re- "(waive the point of the pin.

The chuck-ring may be turned by the hand, so that either its plain-bore portion or its groovexhhore portions are opposite the ehuek-jiuvs. The deepened portirins at the ends ofthe groove engaged by the spring pin serve to yieldingly look the ehueloring in petition with its iluiiibore portions llpjflF sit the eliuekjnn'n. ll lien the plain POP tho I of the cheek-ring are opposite the jaws. then the jaws u re held inwardly and properly hold the SlHtIllC of the drill. lly turning the ehueloring the jaws are permitted to move outwardly and release the drill.

The drill iu led to its work by turning the o shell within. i ts i'lein'p by means of the ornnk 7, Will it is; nionileet than as the drill turns with. the uhell its rotation and advance will he always in harmony, independent of the nature oi the material it operates upon. The keys 14 com ml the chunk unrl drill to turn with the. shell, but permit of the chuck and drill reciprocating to some degree, the cushion-ring l5 holdin; theseparts in normal reerwiird position, .ut yielding to some tle- The ports 24 and the lmigiturli'nal grooves furnishing. my sages to the-mend also the ports 26 an L3? and the port 25 are to be in sullieient number to provide for the How of the lluid with pr iger freedom.

in fluid under pressure reaches the rear end of the cylinder through ports 24 and 26 and produoee the first portion of the forward stroke of the piston. The advance of the he closed by 'oylin--- \"lenrib W, whereupon the fluid from ports 24 romhes the rear not! of the. cylinder through the medium of nuts 27, which have become uncovered. When in the advance of the piston ports 2! shall have become closed by cylinder-rib 22, then the supply of fluid behind the piston becomes entirely cut oil and the iston completes its stroke and delivers its blhw upon the drill by momentum. While the. piston is thus delivering its blow by momentum, it becomes cushioned by the resistance of the fluid temporarily confined in the forward interior portion of the chuckhody u on the forward annulus of the en lqrged end of the piston, the efleet of this pressure alter the piston haw ileliaeritl its blow being to throw the piutui upon iti'ezirn'iti'il or return stroke until ilie porn 137 are eloseil by rib it, whirl: lirin -rthe men to rent for the next lol'VHtitl nu'ol\'t- 'l M; haunt ol' the lltiltl oer-um when port. iii? punlOl'Wnltl ol' rill it), the llllltl then musing; through the rooves in Yllllitllllll-Tll) uiul thence out :it port .25. At the time th pie" ton is delivering its llli) nntl is ino.-.t. .--;i.'li ieet to vilvmtion liable to produce damaging trout upon the parts it. is guided and stew-whet! by the vibration-rib 23, whieh it engages :tli that time, tlte'portion of the piston engaging the bore 'ol this rib being priietieull eurrouinleil by the fluid passing through the gi'om'es in the Viluution-i'il).

The form of the piston in wit-h il'hzl. while it has the lihernlity of length important in nice littiiu;- uml nminteinmw him the ll; m:

Weight eon nntrill-ell at it. lot-mi r ason ol it.:4r= virwii1'ilt'uvily. tl: renrvmnl portion. of the. illhlill 'wi' li'ulll the. vibratory eil'e-i'lu iiieiiz'iaut striking oi the hlow. The zllltilz ggl filvlii oi" the eylimlenrihn in relation to the hammer is sueh am to t fitljlk a z'z blnl tltiluljv' iii-glee oi. boring at all times.

It to be observed that. there at e no hour reelprowling ports, that the iii-ti 11 of t he. iew tion upon the tlrill-uhank wileitauitirilly iilentieul with that of the miner eli'iliingg ll (lrill with u. luintl-luunt ierj the! hem 9.11 no Valves to out and lmili; the; t 'ltf." ltiliii ;s :a.-;t the piston, n'hieli GM. is its own Jul their its way to the exluiuot without niziteuiul inrpztirnient of the force oi the. blunt". that the eonstruetion permits of a. \PT. 'ruat'erinl ro dilution in weight {LS eompor i with known machines of the some capacity; that the chueli is adapted for drills. lori'netl of the ordinary steel of the market: that no damage can result from feeding too fast or too SltYW 8:3 the piston becomes cushioned at each end of its extreme stroke; that the rotation and eulvnnee of the l rill remains in llHI'lllUIi, regentless of variation in material heingilril led {thut the removal of the shelheep permits the re. movul of all of the interior parts; that the All?! tribution of fluid is such us to bring about a rennirkeble eeonomy in operation that ratehetu, gihe, IOUkGls, springqmwlu. pistoin rings, nuts, roclu, yolies, oto, ere diepeuseil with, and that the nuiehine ntitwithstanding its peculiar"elfieienoy is of speeiul sin'iplieity and accomplishes with ten members what in known constructions has required from fifty to sixty members.

While the improvements have been one eielly designed withreferenoe to and have been set forth as finding exemplilicsitiou in a. rock- (lrill, it will at once he recognized by those skilled in the art that a niunher oi the novel features are a iplieable to fiuidmperated tools generally, an it is therefore to he understmid that notwithstanding the exern lification which has been chosen the claims t ereto are not limited specifically to tools for drilling rock or other rhateriel.

I claim as my invention 1. In a rock-drill, the coinhinetion, substantially as set forth, of a shell, means for turning and advancing ssid shell, a cylinder within the shell, a fiuid-actnsted'piston reciprooeting Within the cylinder, :1 chuck-bod y separahly dispos d within the forward end of the shell and having a chambered portion within the shell, and s bushing secured in the forward'end of the shell and serving to retain the chuck-hody therein.

2. ln s rock-drill, the combinstion, substantially as set forth, of e shell, means for turning and advancing said shell, :1 separate cylinder within the shell, 21 fluid-actuated piston reciprocating within the cylinder, :1. chuck-body separahly disposed withinthe forward end of the shell, and a. bushing secured in the forward end of the shell and serv- 1 ing to retain the chuck-body therein.

3. In a roolodrill, the com binstion, substantielly es set forth, of a shell, means for turning and advancing said shell, a cylinder within the shell, a fluid-actuated piston recipro eating Within the cylinder, an exteriorlyshouldered chuck-body se arahly disposed within the forward end of t e shell, having a chambered portion Within the shell, and sbutting against the forward end of the cylinder, a'hushing secured in the forward end of the shell, and e cushion-ring disposed between said bushing and the shoulder of the chuckbod 4. In a rook-drill, the combination, suhstontielly as set forth, of a shell, mean for turning and advancing said shell, a cylinder Within the shell, a fluid-actuated piston reciprocsting within the cylinder, an exteriorlyshouldered chuck-body se arehly disposed Within the forward end of t e shell and shutting against the forward end of the cylinder, :1 bushing secured in the forward end of the shell, 3. cushion-ring disposed between said bushing and the shoulder of the clinch-body, and keys engaging the bushing and chuckhody and adapted to permit reoi rocation and prevent rotation of the chuckonly and huslnn relative to each other 5. T e combination of an outer shell havin an exterior screw-thread end a uniform cylindrical bore; a separate cylinder fitting within the shell and having its rear end llush with the rear end of said shell; a eylinden head serving to close the rear end of said cylinder and having a flen e resting against the rear ends of the cylin er and shell e cap bearing against the flange of the cylinder head; end an interior]y-threaded ring engag ing screw-threads on said cap and said shell and serving to secure the parts described in position.

EDWARD. LEICHTEH.

Witnesses:

FRED SEARLs, JOHN BENDER. 

